Re: Setting oom_adj on linux?

Alex Hunsaker wrote:
> On Thu, Jan 7, 2010 at 20:26, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> > Alex Hunsaker <badalex@gmail.com> writes:
> 
> > We can either drop this in core (with a lot of #ifdef LINUX added)
> 
> Any thoughts on doing something like (in fork_process.c)
> 
> #ifdef LINUX
> void oom_adjust()
> {
> ...
> }
> #else
> void oom_adjust() {}
> #endif
> 
> So there is only one #ifdef?  It still leaves the ugly calls to the function...

The usual solution for this kind of thing is:

	#ifdef LINUX
	#define OOM_ADJUST oom_adjust()
	#else
	#define OOM_ADJUST do {} while (0)
	#endif

so there is no call or dummy function and you reference it in the code
as:

	OOM_ADJUST;

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